import sys
def fibonacci(n):
    a,b,counter = 0,1,0
    while True:
        if(counter>n):
            return
        yield a
        a,b =b,a+b
        counter +=1
f = fibonacci(10)

while True:
    try:
        print(next(f),end=" ")
    except StopIteration:
        sys.exit()
